Worchester Heat Slave 26/32 - low hot water pressure

[DustyM]

I have a customer who's Worchester Heatslave 26/32 has started delivering hot water at a low pressure. Initially when the hot taps are turned on the water is delivered at a high pressure, but then gradually drops off to a trickle after about 15 seconds. I'm due to go around tomorrow and have initially got suspicions of the inline filter prior to the flow switch being perhaps blocked. From what I am being told, the boiler is heating water fine, and is also performing well on the heating side of things. I intend to check all inlet and outlets on the boiler for potential blockages; but not sure if there's anything else boiler wise.........................? Thanks:dunce2:

 

[lame plumber]

check incoming main pressure first someone may have been fiddling with stopcock.

 

[kimbo]

There is also a flow restrictor after flow switch that could be blocked as well.

 

[WHPES]

What's the cold water pressure like?

Check the filter and heat exchanger. If the heat exchanger is scaled up, take it off and drop it in a bucket of descaler for a couple of hours.

 

[DustyM]

Thanks guys - the incoming cold pressure is fine; I'll be checking the filters and then move onto the heat exchanger.

 

[SimonG]

Is it a sudden thing or more of a progressive decline in water pressure. If it's sudden the prob muck in a filter if it's progressive then I would be saying heat ex. Don't like soaking them tho, I just replace,